Manaphy

Manaphy is one of the best wallbreakers and stallbreakers in the tier thanks to Tail Glow. Manaphy also has a wide movepool consisting of many coverage moves, which includes Energy Ball for Water-types like Rotom-W and Slowbro; Ice Beam to hit Latios, Mega Latias, Mega Altaria, and Tangrowth; and Psychic to hit Pokemon like Mega Venusaur, Amoonguss, and Keldeo. Manaphy's ability Hydration removes all status aliments in the rain, making moves like Rest and Rain Dance good moves to run. Manaphy does, however, have an average Speed stat, making fast offensive threats like Serperior, Mega Lopunny, Latios, and Thundurus threats. Manaphy also heavily relies on Tail Glow, making it subpar when it doesn't use a turn to set up, and its typing makes it vulnerable to common types like Electric and Grass.